Safety alert and locating system

Details Safety alert and locating system Safety alert and locating system

1987-06-12

1989-03-14

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Transponders

With plurality of transponders

367127, 367128, 441 89, H04B 159, G01S 380

Patent

active

048130257

ABSTRACT:
A system for monitoring the safety and location of individuals includes a portable transceiver worn by each individual and a base control unit for sending interrogation signals to the individual units. The interrogation signals are transmitted through both air and water, and the individual units transmit a response through the medium through which the interrogation signal was received. The base unit measures both the elapsed time from transmission to reception and the incoming phase angles of the response signal, and converts these measurements to indications of distance and angle between the base unit and the individual transceivers.

REFERENCES:
patent: 3854117 (1974-12-01), Fothergill
patent: 4051350 (1977-09-01), Parent
patent: 4305143 (1981-12-01), Simms et al.
patent: 4320472 (1982-03-01), Fort
patent: 4590591 (1986-05-01), LeRoy et al.
patent: 4635236 (1987-01-01), Roberts
patent: 4673936 (1987-06-01), Kotoh

Affiliated with

Also associated with

Rating

Safety alert and locating system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Safety alert and locating system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety alert and locating system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-898872